Selon Matthias Scheler:

Hello Matthias, and thanks for answering. Sorry for the mess with that answer, a
full mailbox is the reason that I've not received your message, but seen it on
Gmane, and answer you this way.

>> On a fresh NetBSD-current install, I've pkgsrc-ed a modular X.org server,
>> and when I want to pkgsrc sysutils/xentools3-hvm, make ends with the
>> following error message:
>>
>> ERROR: This package has set PKG_FAIL_REASON:
>> ERROR: Do not include x11.buildlink3.mk for X11_TYPE != "native".
>> *** Error code 1
>>
>> Is there any workaround so far ?
>
>It seems something is wrong with your system.
>- Do you have "X11_TYPE=native" in "/etc/mk.conf"?

No, I've 'X11_TYPE=modular'

>- From what branch of "pkgsrc" did you build? HEAD, 2007Q4, something else?

2007Q4 is the branch I used.

>- Do you have old monolythic "xorg" packages (e.g. "xorg-libs") installed?

No. Like explained in a Howto[1], I've installed NetBSD (snapshot 200801190002Z)
_without_ the X sets, put 'X11_TYPE=modular' in /etc/mk.conf, and pkgsrced the
following packages:
x11/modular-xorg-server
meta-pkgs/modular-xorg-fonts
x11/xf86-input-keyboard
x11/xf86-input-mouse
x11/xf86-video-ati
x11/xauth
x11/xinit

[1] http://rubenerdshow.com/blog/modular-xorg-on-netbsd-from-scratch/

-- 
Etienne